Contributed backend development expertise to two open-source projects over a two-month period, focusing on Java and Spring Boot. In the LearningCircuit/local-deep-research repository, addressed a data quality issue in the Question Generation pipeline by removing leading and trailing quotation marks from generated questions, which improved downstream usability and eliminated manual post-processing. Later, enhanced the vaadin/flow project by implementing the eagerServerLoad flag in VaadinConfigurationProperties, exposing it through Spring Boot configuration metadata to enable IDE autocomplete and accurate metadata generation. This work included updating automated tests and aligning with collaborative review processes, supporting more reliable integration for Java-based Spring Boot applications.